GB621206A - Improvements in electrical oscillators - Google Patents

Improvements in electrical oscillators

Info

Publication number
GB621206A
GB621206A GB35156/45A GB3515645A GB621206A GB 621206 A GB621206 A GB 621206A GB 35156/45 A GB35156/45 A GB 35156/45A GB 3515645 A GB3515645 A GB 3515645A GB 621206 A GB621206 A GB 621206A
Authority
GB
United Kingdom
Prior art keywords
valve
dec
group
mixer
coupled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB35156/45A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB621206A publication Critical patent/GB621206A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/12—Angle modulation by means of variable impedance by means of a variable reactive element
    • H03C3/14—Angle modulation by means of variable impedance by means of a variable reactive element simulated by circuit comprising active element with at least three electrodes, e.g. reactance-tube circuit
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L5/00—Automatic control of voltage, current, or power
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Superheterodyne Receivers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

621,206. Automatic control systems. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Dec. 29, 1945, No. 35156. Convention date, Dec. 29, 1944. [Class 38 (iv)] [Also in Group XL (c)] The frequency of a cathode-coupled oscillator is maintained constant by control of the bias applied to the valve having the frequency determining circuit in its anode lead. Valve 1 comprises two triodes with a common cathode impedance 9, 10. The tuned circuit 3 is coupled to a mixer 15, fed from a crystal oscillator 16, the output from the mixer supplying a discriminator 17 to develop a control potential for application to the grid of valve I. Specifications 540,941 and 541,149, [both in Group XL], are referred to.
GB35156/45A 1944-12-29 1945-12-29 Improvements in electrical oscillators Expired GB621206A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US570294A US2509280A (en) 1944-12-29 1944-12-29 Cathode-driven oscillator

Publications (1)

Publication Number Publication Date
GB621206A true GB621206A (en) 1949-04-06

Family

ID=24279057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35156/45A Expired GB621206A (en) 1944-12-29 1945-12-29 Improvements in electrical oscillators

Country Status (2)

Country Link
US (1) US2509280A (en)
GB (1) GB621206A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2789226A (en) * 1946-03-21 1957-04-16 George H Nibbe Automatic frequency control system
US2644924A (en) * 1949-09-03 1953-07-07 Gen Electric Frequency modulation system
US2738423A (en) * 1952-02-19 1956-03-13 Rca Corp Regenerative frequency dividers
US2747093A (en) * 1952-05-01 1956-05-22 Raymond Rosen Engineering Prod Telemetering oscillators

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2066528A (en) * 1934-12-29 1937-01-05 Bell Telephone Labor Inc Synchronous control of oscillators
US2233778A (en) * 1938-07-15 1941-03-04 Rca Corp Automatic frequency control circuit
US2269417A (en) * 1939-05-13 1942-01-06 Rca Corp Cathode-driven oscillator
US2416304A (en) * 1942-09-05 1947-02-25 Standard Telephones Cables Ltd Trigger circuit
US2388098A (en) * 1942-09-29 1945-10-30 Rca Corp Wave length modulation
US2405876A (en) * 1943-06-30 1946-08-13 Rca Corp Variable dot keyer

Also Published As

Publication number Publication date
US2509280A (en) 1950-05-30

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